Artist sketchbook with natural art tools - oils, acrylics, pastel, charcoal etc. TwistedBrush is a software that helps you paint, sketch and draw with completely natural art tools and sets. Easy and fun! TwistedBrush - digital paint software with complete natural art tools. Software for artists without the complexity of other art programs. Compare us to the other "natural media" art programs. TwistedBrush has one of the most versatile and powerful brush engines in existence, yet it as designed from day one to be easy to use.